The invention relates to novel compounds of formula wherein R1 represents a polymer, aryl or alkyl group, R2 presents a hydrogen atom, a halogen atom, a radical CN, CF3, OH, OCF3, COOH, R7, OR7 or OCOR7, R3 represents an aryl or alkyl halogen, R4 represents an alkyl radical. 5%, and less than or equal to 1. The control circuit is electrically connected between the digital-to-analog current converting device and the current-storingreproducing module for providing a switch between the transformingstoring status and the reproducingsustaining status. The filter coefficient may be generated on the fly utilizing a windowed sinc function corresponding to the scaling factors. The variety was developed as an open pollinated seedling of Candy White white flesh nectarine. The display case may comprise a produce display case, meats display case, vegetables display case, floral display case, dairy display case, a frozen foods display case, or a similar type case.